<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        let goods = {
            uname: '小米',
            num: '1000',
            weight: 0.55 + 'kg',
            address: '中国大陆',
            'uu': '不是'
        }
        goods.num = '7777'
        goods.hobby = '哈哈'
        delete goods.hobby
        console.log(goods);
        console.log(typeof goods);
        console.log(goods.uname);//查 的一种方法
        console.log(goods['uu']);//带有字符串的

    </script>
</body>

</html>